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Fluke BT521 Battery Analyzer

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Product Details

Fluke BT521 Battery Analyzer


The Fluke BT521 Advanced Battery Analyzer is a comprehensive tool designed for the detailed testing and maintenance of stationary battery systems. This device is ideal for use in critical backup applications where reliable battery performance is essential.

This analyzer is particularly useful in facilities like data centers, telecommunications networks, and other infrastructure relying on continuous power availability. It ensures that battery systems are not only functioning but are also optimized for longevity and reliability.

Fluke BT521 Key Features

  • Key measurements – Internal battery resistance, dc and ac voltage, dc and AC, ripple voltage, frequency, and temperature.
  • Sequence measurement mode – Automatic or manual sequence testing of battery strings with automatic measurement storage including voltage, resistance and temperature (with BTL21 intelligent test probe), eliminating the need to press a button each time a measurement needs to be saved.
  • Comprehensive logging – All measured values are automatically captured during testing and can be reviewed on the instrument before downloading for on the-go analysis.

Fluke BT521 Specifications

General Specifications – Battery Analyzer
Size (H x W x D) 22 x 10.3 x 5.8 cm (9 x 4 x 2 in)
Weight 850 g (1.9 lb)
Screen dimensions 7.7 x 5.6 cm (3 x 2.2 in)
Interface USB mini
Range Resolution Accuracy BT510 BT520 BT520ANG BT521 BT521ANG
Battery Resistance / Strap Resistance1 3 mΩ 0.001 mΩ 1% + 8
1% +68
30 mΩ 0.01 mΩ 0.8% + 6
0.8%+12
300 mΩ 0.1 mΩ 0.8% + 6
3000 mΩ 1 mΩ 0.8% + 6
VDC 6 V 0.001 V 0.09% + 5
60 V 0.01 V 0.09% + 5
600 V 0.1 V 0.09% + 5
1000 V 1 V 0.09% + 5
VAC (45 Hz to 500 Hz with 800 Hz filter) 600 V 0.1 V 2% + 10
Frequency (displayed with VAC and AAC)2 500 Hz 0.1 Hz 0.5% + 8
AC voltage ripple (20 KHz Max) 600 mV 0.1 mV 3% + 20
6000 mV 1 mV 3% + 10
ADC/AAC (with accessory Fluke i410) 400 A 1 A 3.5% + 2
Temperature 0°C to 60°C 1°C 2°C (4°F)
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Fluke BT521 Battery Analyzer